After contacting Bootleg regarding their Bootleg adjustable carrier failing to cycle in my rifle unsuppressed in any configuration, I was given this tidbit. The Bootleg adjustable bolt carrier group is designed to ONLY function with a carbine length system with a carbine buffer. It is NOT capable of functioning in a comparable fashion to "regular" bolt carrier groups. It will not function with a Vltor A5 System. Bootleg chose not to share these substantially specific configuration requirements in any product listing, video, or advertisement. I now have a completely useless $200 bolt carrier group. That kind of deceptive marketing is truly despicable. Per Bootleg's website, the only design restriction is related to this products use in 223/556 chambered firearms. 6 months of searching before purchasing this carrier and this information was not found anywhere. I guess I'll be purchasing a demonstrably superior AO Precision BCG for $90.